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cje ›› 2004, Vol. ›› Issue (2): 66-72.

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Predation risk and its impact on animal foraging behavior

LU Jiqi1,2, ZHANG Zhibin1   

  1. 1. State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Scienses, Beijing 100080, China;
    2. College of Life Sciences, Henan Normal University, Xinxiang 453002, China
  • Received:2002-11-29 Revised:2003-03-24 Online:2004-04-10

Abstract: As the most commonly seen and normal behavior, foraging behavior is necessary to existence and reproduction of all animals. Members within an ecosystem was an entity which was connected throughtrophic relationship,i.e. food chain (web). The predation-prey relationship was ubiquitous among biological realm. Every living thing maybe become prey of predators while foraging. The influence of predation covered almost the whole animal behavioral decision-making ways. The risk of any animal being preyed was the foundation of various behavioral decision-making in a ecological time. Prey animals, located in middle trophic level, must not only search food to meet their survival need, but also cope with predation risk caused by predators around them. In other words, prey animals need to trade off between cost and benefit in the course of their foraging. Only by doing so can they attain optimal foraging efficiency. The implication of predation risk and its influences on animal foraging behavior and the response of prey to predators were introduced in this paper. Besides, there are some issues, which were deficient in the past works,should be pay more attention on in the research future.

Key words: Asynchrony hatching, Nestling growth, Egretta garzetta, Ardeola bacchus, Nycticorax nycticorax

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